Dental attachment for removable bridges and clasp dentures



Sepfiz. 25, 1923. 1,469,177

s. DOSKOW DENTAL ATTACHMENT FOR REMOVABLE BRIDGES AND CLASP DENTURES Filed March 5, 1923 1 INVENTOR WITNE55E5 I WIMW A ATTORNEY abutment.

Patented Sept. 25, 1923.

I TED res SAMUEL :oosKow, on NEW YORK, N. Y. I

DENTAL ATTACHMENT ron REMOVABLE BRIDGES AND CLASP DENTURES.

Application filed March 5, 1923. Serial No. 623,072.

To'aZZ whom it may concern.

Be it known that I, SAMUEL DOSKOW, acitizen of the United States of America, residing at New York city, in the county of New York and State of New York, have invented certain new and useful Improve, ments in Dental Attachments for Removable Bridges and Clasp Dentures, of which the following is a clear and exact specification, reference being had therein to the accompanying drawing.

My invention relates to removable bridges and clasp dentures, and more particularly to the application and construction of stress-breaking attachments for the clasps.

The attachment forming the substance of this invention consists of a linking member permanently mounted on the clasp and a socket member fixedly supported on the removable bridge or denture, the combination of the linking and socket members acting as the means for permanently joining the clasp to the removable bridge or denture. This attachment may be used with any type or form of dental clasp that is adapted to support a removable bridge or denture in the mouth. The stationary tooth in the mouth to which the clasp is gripped is termed its The principal object of my invention is to provide an attachment for the clasps of re movable bridges or dent-ures wherein the stress on the removable bridge or denture due to mastication and similar natural causes, is

absorbed by the ability of the removable bridge or denture to function with a restricted universal movability relative to its fixed abutments, by virtue of the construction of the linking and socket members of the attachment. That is, where ordinarily the mastication stresses are absorbed in frictional movement or play of the clasp against the contact surface of its abutment, with its attendant ill effects, it has been the object herein to provide such an attachment, whereby these stresses are absorbed by the universal free play or movement acquired by the removable bridge or denture relative to its stationary abutments, this said universal free movement being restricted and equiva lent to the natural tooth movement during mastication;

A further object of my invention has been the provision of a dental clasp stressfbreaking attachment simple and strong in cont uct on, and posit e a t on,

In. view of theaforesaid objects, and the further'objects obvious in the description following, the dental clasp stress-breaking attachment forming the substance of this ,invention'consists of the novel features of construction and arrangement and combination of parts, hereinafter described; and illustrated, and as particularly set forth in the claims appending this specification.

In the accompanying drawing I have illustrated a preferred embodiment of my invention,to attain the aforementioned-ob- Figure 1 is a perspective view of the socket member of the attachment.

V Figure 2 is a perspective View of the cover for closing the top opening of the socket member.

Figure 3 is a perspective View of the link ing member of the attachment. j

Figure 4 is an elevation of a two-tooth removable bridge or clasp denture, in position between its abutments, showing both the socket and linking membersof one attachment in lateral section.

Figure 5 is a fragmentary View ofthe removable bridge or clasp denture, showing a plan section taken midway through both the socket and linking members of one attachment and its clasp.

The linking member of my attachment consists of the head element 1, having formed thereto the shoulder bar 2, which in turn terminates into the slightly curved web element 3. Although the formation of the shoulder bar 2 to the head element 1 and web 3 is shown, in each instance in the accompanying drawing, to be at an angle of (90) degrees, these angles may be of values other than (90) degrees, and of dissimilar magnitudes, to .suit specific cases. The head element 1 is formed, referring to Figures 3, i

and rear surfaces, i. e., that portion of the surface opposite to the shoulder junction and the portion ofthe sur'face adjacent to the shoulder junction, respectively, somewhat flattened In-addition, the front .sur-

face recedes just sufi'iciently from the center towards the lateral extremities, forming a slightly curved eminence-extending vertically along the centralpor'tion of the front sur e of th'e'lieadlelen ent, It is pref rw 7 V able to-have the head element l,'theshoulder bar'2, rand the webBformed' inone piece, as

the linking member is applied to the artificial denture with the application ofheat.

The socket member of the attachment consists of .aifiat metallicsheet bent to :form an elliptically shaped wall at, referring to Fig.

1, the wall having positioned centrally lthe slot 5, extending the full length thereof. T he lowerterininussof the socket wall A is provided with the fiatibottom 6, which may bean integral part of the wall, .or a piece separate from the wall and soldered thereto.

"The upper terminus of the socket wall 4;

member, after it has been finally made to engage within the socket men'iber, slight up and down movement.

The curvature of that section of *the sock et walla opposite tothe slot 5, i. e., that section of the wall co-operating with the eminence portion of the head 1, is such as to correspond to the contour of the eminence portion of the head, but with a somewhat greater sweep of arc. Thus, when the head element 1 of the linking member is made to-engage'within the socket ;member, and the top 7 fixed in position, the linking member will he possessed of a restricted movement or play in any direction, i. e., a restricted universal movement. The elliptically shaped opening formed by the socket wall a is of uniform section throughout the full height of the wall.

In Fig. 4 I show a two clasp removable bridge or denture, composed of an artificial first molar 8 and second bicu'spid 9, supported between the natural second molar 10 and natural first bicuspid 11, each clasp 'be ing provided with the stress-breaking attachment. The first molar 8 and second bicuspid 9 are permanently mounted on the bridge saddle structure 12, the second molar 10 and first bicuspid 1'1' acting as the abutment teeth therefor.

"The socket member of each attachment is permanently positioned (soldered) onto the (soldered) to itsrespective clasp 13, reference being had to Figures 4 and 5. The linking member of each attachment is then "seated within its-.respective socket mem her, and a top cover 7 is fixed in position, soldered, over the upper terminus of each socket member.

The olasps .13 will now permanently be supported .to the -saddle structure 1'2, and by virtue of their connection to the linking i their inherent tension-ability.

stricted universal movement. However,

when-the removable bridge or denture is seated in position between its abutments in the mouth, in this instance the clasps 13 gripping the second ;-molar l0 and first bicuspid ll acting as the abutment teeth, this restricted universal movement relative to for the clasps will then beheld tightly grippedto the respective abutment-teeth by Thus, the mastication and similar stresses due to natural functions that are ordinarily absorbed by the frictional movement of the clasp against the contact surface-of the abutment tooth are here absorbed by the restricted universal movementor play of'the removable bridge or denture.

The method of supporting "the socket members on the removable "bridge or den ture *and the method of mounting the linklng members on the =clasps, as referred to in the foregoing, IS UHdQ-IS'L OOd to be carried out in the manner wellknownto'thoseskill'ed in the art and technique of this branch of dentistry. Although I have illustrated and described in the foregoing, a removable bridge or denture consisting of two artificial L corrosive metal, preferably a plati i d alloy. Both members of the attachements may be constructed of similar material or otherwise. 7

Herein I have illustrated and described a practical embodiment of my invention in considerable detail, and I wish to set forth that modifications and changes thereof may be readily resorted to without departing from the spirit andsc'ojpe of the invention, as expressed in the appended claims.

hat I claim is: V l; A dental attachment for removable bridges and clasp dentures, comprising an oval or egg-shaped head linking member adapted 'to be permanently mounted. on the clasp, and an elliptically shaped socket member with a closed topand closed bottom adapted to be permanently secured on linking member ie'ngagirrg permanently withln the said socket member and acting the removable bridge or denture, the said as the means for permanently joining the said clasp member in restricted universally movable relationship 'to the .removable element integrally bridge or denture, substantially as set forth.

2. A dental attachment for removable bridges and clasp denturesfcomprising a linking member composed of an oval or 1 said socket member; the linking member en- "gaging permanently within the walled area of the socket member with the said shoulder bar disposed in the slotted section of the socket wall. I

. 3. A stress breaking dental attachment for removable bridges. and clasp dentures, comprising a linking member composed of an oval or egg-shaped head element with front and rear surfaces somewhatfiattened and having d1sposed vertically along the central portion thereof, the front surface, a slightly curved eminence, on a shoulder bar 7 formed on the rear part" element integrally of the head element," vertically and centrally, and of a slightly curved Web'element said shoulder formed integrally on the bar, a socket member'formed of an elliptically shaped wall slotted Vertically and provided, Wlilh' covers for closing the top and bottom openings;

means for permanently joining the clasp H the said linking member seating permanently within the said 7 socket member and unitedly forming the Y member in restricted movable relationship f to the removable bridge or denture. g V v 4. A stress-breaking dental attachmentf' for removable bridgeWor-k or clasp dentures, comprising a linking member composed of a head element a shoulder bar element and Web Q element all integrally formed andadapted tobe permanently secured to the claspmember, a closed'bottom socket member formed of a slotted elliptically shaped wall adapted to be permanently supported on the saddle structure of the removable bridge or denture, I and a cover element adapted to permanently close the top opening 'of the said socket memberaften the head element of the seated therein.

linking member has been SAMUEL nosKow i 

